2 papers
physics.hist-ph2018
Algol as Horus in the Cairo Calendar: the possible means and the motives of the observations
Sebastian Porceddu, Lauri Jetsu, Tapio Markkanen +4
An ancient Egyptian Calendar of Lucky and Unlucky Days, the Cairo Calendar (CC), assigns luck with the period of 2.850 days. Previous astronomical, astrophysical and statistical an…
astro-ph.IM2018
Digitization and astrometric calibration of Carte du Ciel photographic plates with Gaia~DR1
K. Lehtinen, T. Prusti, J. de Bruijne +6
We want to study whether the astrometric and photometric accuracies obtained for the Carte du Ciel plates digitized with a commercial digital camera are high enough for scientific…